Fig. 5

Fatty infiltration of paraspinal muscles among ages (post hoc analysis with Bonferroni correction). A Fatty infiltration of Multifidus in subjects aged over 41 years significantly increased compared with that in subjects aged less than 30 years. ^*P-value < 0.05. B Fatty infiltration of Erector spinae in subjects aged over 41 years significantly increased compared with that in subjects aged less than 30 years. ^*P-value < 0.05. C Fatty infiltration of Psoas in subjects aged over 41 years significantly increased compared with that in subjects aged less than 40 years. ^*Adjust P-value < 0.05 (non-normally distributed data)